二维稳态导热的VB代码计算，采用有限差分，自己更改边界条件，进行各类边界条件的计算，分网大小自己进行更改
Private sub command()
Dim i as integer ,j as integer ,k integer,n as integer
Dim a as variant
a=array(0.92,0.6,0.58,0.41,0.1,0.1,0.1)
b=array(0.7,0.58,0.43,0.35,0.228,0.28)
d=array(0.345,0.005,0.065,0.115,0.23,0.23)
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002192s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.092677s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000950s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001237s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000988s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003118s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000834s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003988s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017453s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001055s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 24882 [ RunTime:0.024519s ]
